CODEWITHSUNDEEP
elasticsearch
stolmen
stolmen

Reputation: 3

What is the difference between raw and keyword fields?

In Elasticsearch 7, consider these three mappings:

        "properties" : {
             "actors" : {
               "type" : "text",
               "fields" : {"keyword" : {"type" : "keyword","ignore_above" : 25}}
             },

and

  "properties" : {
             "actors" : {
               "type" : "text",
               "fields" : {"raw" : {"type" : "keyword","ignore_above" : 25}}
             },

and

  "properties" : {
             "actors" : {
               "type" : "text",
               "fields" : {"custom_field" : {"type" : "keyword","ignore_above" : 25}}
             },

What is the difference between

Upvotes: 0

Views: 2114

Answers (2)

Ryan Pham
Ryan Pham

Reputation: 196

They are just preference: https://www.elastic.co/guide/en/elasticsearch/reference/8.8/multi-fields.html

FYI, ElasticSearch version >= 5 have two string types:

  • text
  • keyword

From your example: actors is text type. Then by default it will perform full-text-search. If you want to do exact-match search on this field, you will need to custom your parameters by adding either keyword, raw, custom_field at the end.

Example:

 # There are records
   {
     actors: "hello world"
   },
   {
     actors: "hello mom"
   }

Default search will perform full-text search:

GET products/_search
{
 "query": {
   "match": {
     "actors": "hello"
   }
 }
}
actors: "hello" => will return 2 above records.

If you want to perform keyword search (exact match) then we need to custom your parameter as the following:

#1 
GET products/_search
{
 "query": {
   "match": {
     "actors.keyword": "hello"
   }
 }
}
#2  
GET products/_search
{
 "query": {
   "match": {
     "actors.raw": "hello"
   }
 }
}
#3
GET products/_search
{
 "query": {
   "match": {
     "actors.custom_field": "hello"
   }
 }
}

Upvotes: 0

jaspreet chahal
jaspreet chahal

Reputation: 9099

They are same. They are just three fields with type as keyword, having different names

Upvotes: 1

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